Index: includes/theme.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/theme.inc,v
retrieving revision 1.519
diff -u -p -r1.519 theme.inc
--- includes/theme.inc	31 Aug 2009 19:50:17 -0000	1.519
+++ includes/theme.inc	6 Sep 2009 14:25:29 -0000
@@ -1509,7 +1509,12 @@ function theme_image($path, $alt = '', $
  */
 function theme_breadcrumb($breadcrumb) {
   if (!empty($breadcrumb)) {
-    return '<div class="breadcrumb">' . implode(' » ', $breadcrumb) . '</div>';
+    // Provide a navigational heading to give context for breadcrumb links to
+    // screen-reader users. Make the heading invisible with .element-invisible.
+    $output = '<h2 class="element-invisible">You are here</h2>';
+
+    $output .= '<div class="breadcrumb">' . implode(' » ', $breadcrumb) . '</div>';
+    return $output;
   }
 }
 
Index: themes/garland/template.php
===================================================================
RCS file: /cvs/drupal/drupal/themes/garland/template.php,v
retrieving revision 1.29
diff -u -p -r1.29 template.php
--- themes/garland/template.php	1 Sep 2009 20:39:55 -0000	1.29
+++ themes/garland/template.php	6 Sep 2009 14:25:29 -0000
@@ -10,7 +10,12 @@
  */
 function garland_breadcrumb($breadcrumb) {
   if (!empty($breadcrumb)) {
-    return '<div class="breadcrumb">' . implode(' › ', $breadcrumb) . '</div>';
+    // Provide a navigational heading to give context for breadcrumb links to
+    // screen-reader users. Make the heading invisible with .element-invisible.
+    $output = '<h2 class="element-invisible">You are here</h2>';
+
+    $output = '<span class="element-invisible">You are here:</span>';    $output .= '<div class="breadcrumb">' . implode(' › ', $breadcrumb) . '</div>';
+    return $output;
   }
 }